Hi
I have a BBQ igniter circuit from my grandpas BBQ, it dose not work any more, it has 2 transistors, a large coil inside some plastic, and a large blue square capacitor, i dont know much about these circuits and was wondering if anyone could help me,

Drawing is from memory, and that's not getting better. Each push of the switch prodeces a spark. The cap. probably around 200μF or bigger, spark coil like used in model airplane engines of the 1940's. I may still have it somewhere. Every thing in use now is piezeo.